Concept Check 5.3 (:

Characteristics of LIPIDS
-LIPIDS are a typical class of water-avoiding compounds such as Oil
- Water avoiding molecules are said to be HYDROPHOBIC
-Lipids acts as a boundary that surrounds and contains watery contents of your cell
- Common Lipids are like fats which store energy in your body


FATS
- FAT consists of three-carbon backbone called glycerol attached to three fatty acids, which contain long hydrocarbon chains
-Some fats are solid at room temperature while others fats, oils are liquid
- fatty cushion stores energy for later use and cushion your organs and provide your body with insulation
-SATURATED FAT: is a fat which all three fatty acid chains contain the maximum possible number of hydrogen atoms
-Saturated fat forms single bonds with others and hydrogen atoms, and are solid in room temp, butter
-UNSATURATED FAT: contains less than the maximum number of hydrogen atoms on one or more of its fatty acid chains, because some of its carbon atoms are double-bonded to each other
-unsaturated fat include fruits, veggies
-too many saturated fat can be unhealthy causing blood flow problems

UNSATURATED FAT

SATURATED FAT

STEROIDS
- A lipid molecule in which the carbon skeleton forms four fused rings is STEROID
- Steroids are hydrophobic
-Estrogen steroids a female sex hormone, and testosterone, male sex hormone circulation by sending chemical signals

- CHOLESTEROL: an essential molecule found in the membranes that surround your cells.
-cholesterol has a bad reputation of high levels in particular cholesterol contain substances, increasing risks of heart disease

Concept Check:

1. What property do lipids share?
Lipids are all sharing the same property of being hydrophobic, water-avoiding molecules.
2. What are the parts of a fat molecule?
The parts of a fat molecule are three=-carbon backbone called glycerol attached to three fatty acids, which contain long hydrocarbon chains
3. Describe two ways that steroids differ from fats?
Steroid differ from fats in structure and function. Steroids circulate body signals, and their structure are different from those of lipids.
4. What does the term unsaturated fat on a food label mean?
Unsaturated fat contains less than the maximum number of hydrogen atoms on one or more of its fatty acid chains, because some of its carbon atoms are double-bonded to each other. Some examples of unsaturated fat include fruits, veggies and fish.